TORONTO, Sept 29 (Reuters) - Canada’s main stock index rose on Tuesday in choppy trading, as Valeant Pharmaceuticals International and energy stocks helped lead the market back into positive territory after an earlier reversal.

Index heavyweight Valeant gyrated broadly after taking a more than 16 percent hit in the previous session following accusations of “massive” price increases by Democratic lawmakers. Shares rose 0.5 percent to C$222.81 in late morning trading.